21697875

素因数分解:

$3^4\times 5^3\times {\mathrm{2143}}^1$

素因数の和:2170

約数の個数: 40

約数和(自身を含む): 40470144

約数和(自身を除く): 18772269

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 125, 135, 225, 375, 405, 675, 1125, 2025, 2143, 3375, 6429, 10125, 10715, 19287, 32145, 53575, 57861, 96435, 160725, 173583, 267875, 289305, 482175, 803625, 867915, 1446525, 2410875, 4339575, 7232625, 21697875]

約数ペア:

[(1, 21697875), (3, 7232625), (5, 4339575), (9, 2410875), (15, 1446525), (25, 867915), (27, 803625), (45, 482175), (75, 289305), (81, 267875), (125, 173583), (135, 160725), (225, 96435), (375, 57861), (405, 53575), (675, 32145), (1125, 19287), (2025, 10715), (2143, 10125), (3375, 6429)]